John stephenson



(No Model.)

J. STEPHENSON. COMBINED WHEEL AND RAIL BRAKE MEGHANISM.

No. 450,849. Patented Apr. 21,1891.

WITNESSES V NyNTOR J V W DMD L7 .ltforneys.

lTlE STATES JOHN STEPHENSON, OF NEW YORK, N. Y.

BINED WHEEL. AND RAIL BRAKE MECHANISM.

SPECIFJEOATION forming part of Letters Patent N0. 450,849, dated April 21, 1891.

Application filed January 6,-1891. Serial No. 376,873. (No model.)

To aZZ whom it may concern.-

Be' it known that 1, JOHN STEPHENSON, a cit-t zen of the United States, residing at New York, in the county and State of New York,. have invented certain new and useful Imwheels for ordinary service, and cars on unusually steep grades require also rail (or track) brakes, for which space cannot always be had. This recently brought into use a girder attached to the axle-boxes, and hitherto used only for carrying the rail (or track) brake; but necessities arise for combination of both brakes in one housing to be carried without assistance by a lone girder borne by the axleboxes. Such is the purpose of this invention, and I will now describe the construction illustrated in the drawings, showing the manner in which I preferably embody the invention.

In the drawings, Figure l is a side View of so much of arunning-gear of a tram-car as is necessary to illustrate my invention. Fig. 2 is a plan view of a portion thereof, and Fig. 3 is a vertical transverse section of Fig. 1 on the line a a. i

The girder A is shown supported from the axle-boxes and supports a housing B, having a vertical base-piece B, shown secured to the inner side of the girder A. At the apex 13 of the housing are formed journal-bearings O, suitable for the wheel-brake rock-shaft D, and below these bearings the bed-plate of the housing has a conduit E for two sections of the wheel-brake sliding bar F, and below this conduit (toward each end of the bed-plate) are two brackets G, holding the bearings for two rail-brake rock-shafts H, and adjoining these rock-shafts the vertical bed-plate has two channels I, suited to receive two vertical guidesJ of the rail-brake shoe K, which shoe has on its upper surface two pairs of lugs 70, prepared for two vertical coupling-bars L, uniting the two ends of the track-shoe with arms ll, of the two rail-brake roclcshafts H, which shafts are united by a coupling-bar M, connected to the arms m on the rock-shafts I 1, and one of these arms is elongated, as at 112/, and prepared to receive the connecting rod N, conducting the actuating-power.

The track-shoe K is provided with a wood block or sole 0, fitting the shoe and extending below the edge of the shoe as much as the vertical motion of the shoe will permit, and the shoe is held in place by two transverse bolts 0 passing through both the walls of the shoe.

The wheel-brake shoes are mounted on the ends of the sliding bars F, and these bars are connected byplunger-bars Q, having turnbuckles R, to the arms (Z on the rook-shaft D, and an arm S, also connected to the rockshaft, carries an energy-rod T, by which the operator transmits power to the brake mechanism.

What I claim is- 1. A car-brake housing adapted to be solely carried by a lone girder attached to the axleboxes at one side of the car, the said housing supporting a moiety of both the car-wheel and the rail-brake mechanisms, substantially as described.

2. A car-brake-housing bed-plate with rock shaft bearings at its apex prepared for a wheel-brake rock-shaft, and below the rockshaft a conduit prepared for two sections of the wheel-brake-shoe sliding bar, and beneath the conduit two brackets or other provisions for j ournal-bearings for two railbrake rockshafts, substantially as described.

3. A car-brake-housing bed plate having beneath the wheel-brake-shoe sliding-bar conduit one or more vertical channels adapted to one or more rail-brake shoe-guides, substantially as described.

4. A car-brake housing with bed-plate having one or more vertical channels in which are one or more guides of the rail-brake shoe, which shoe has two pairs of lugs holding the lower ends of two vertical coupling-bars with their upper ends in union with arms of two coupled rock-shafts housed below the wheelbrake-shoe slide-bar conduit, substantially as described.

5. A car-brake housing combining within itself a moiety of the mechanism of a carwheel brake, having in its composition a rockshaft with its bearings and connections, and

the wheel-brake-shoe sliding bars lodged In testimony whereof I have signed my in channels, beneath which are other rockname to this specification in the presence of [O shaft or shafts connected With the tracktwo subscribing Witnesses. brake shoe, the housing alone holding these l 5 mechanisms and qualified to maintain them H S H when it is secured to-a single girder borne by Witnesses: the axle-boxes at one side of the car, sub- S. A. STEPHENSON, st-antially as described. WM. J. WALKER. 

